Toronto, Ontario weather in December

Averages from 2021–2025 (155 days of record).

Average high: 38°F
Average low: 27°F
Rainy days: ~13 per month
Total precipitation: 3.4 in
Warmest recorded: 59°F
Coldest recorded: 1°F

Expect December days in Toronto, Ontario to top out around 38°F and cool to about 27°F overnight, with roughly 13 days of measurable rain across the month. In recent years December has ranged from 1°F to 59°F.

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Current Toronto, Ontario forecast → · Historical data by Open-Meteo (ERA5).